- update to 43.0.0:
* BACKWARDS INCOMPATIBLE: Support for OpenSSL less than 1.1.1e
has been removed. Users on older version of OpenSSL will
need to upgrade.
* BACKWARDS INCOMPATIBLE: Dropped support for LibreSSL < 3.8.
* Updated Windows, macOS, and Linux wheels to be compiled with
OpenSSL 3.3.1.
* Updated the minimum supported Rust version (MSRV) to 1.65.0,
from 1.63.0.
* :func:`~cryptography.hazmat.primitives.asymmetric.rsa.generat
e_private_key` now enforces a minimum RSA key size of
1024-bit. Note that 1024-bit is still considered insecure,
users should generally use a key size of 2048-bits.
* :func:`~cryptography.hazmat.primitives.serialization.pkcs7.se
rialize_certificates` now emits ASN.1 that more closely
follows the recommendations in RFC 2315.
* Added new :doc:`/hazmat/decrepit/index` module which contains
outdated and insecure cryptographic primitives. :class:`~cryp
tography.hazmat.primitives.ciphers.algorithms.CAST5`, :class:
`~cryptography.hazmat.primitives.ciphers.algorithms.SEED`, :c
lass:`~cryptography.hazmat.primitives.ciphers.algorithms.IDEA
`, and :class:`~cryptography.hazmat.primitives.ciphers.algori
thms.Blowfish`, which were deprecated in 37.0.0, have been
added to this module. They will be removed from the cipher
module in 45.0.0.
* Moved :class:`~cryptography.hazmat.primitives.ciphers.algorit
hms.TripleDES` and :class:`~cryptography.hazmat.primitives.ci
phers.algorithms.ARC4` into :doc:`/hazmat/decrepit/index` and
deprecated them in the cipher module. They will be removed
from the cipher module in 48.0.0.